A113



The Doepfer A-113 module requires +5v power. When using it in a Doepfer case, an A-100 AD5 +5v adaptor board is required.

The A-113 is a new sound source that derives from an incoming pulse signal four so-called subharmonics. The term subharmonics was introduced by Oskar Sala in connection with his so-called Mixtur-Trautonium. A subharmonic means in this context a sawtooth wave whose frequency is derived from a master frequency and the master frequency is an integer multiple in the range of 1...24 of the subharmonic - in other words: the master frequency is divided by an integer 1...24 to obtain the subharmonic. Pay attention that the output waveform of a subharmonic is sawtooth (as also used in the original Trautonium) and not sine. The term subharmonics is somewhat misleading. The master frequency comes e.g. from an A110 or A111 to the frequency input of the A-113. The frequency dividers of the 4 subharmonics is adjusted with up/down buttons as displayed with 2 character LED displays. The subharmonics are available as single outputs and as mix output with adjustable levels for the subharmonics.

Two gate type control inputs enable to select between 4 different mixtures, i.e. 4 different settings of the frequency dividers. In the original Trautonium these are controlled by foot switches to switch between 3 mixtures while playing (the original Trautonium has only 3 mixtures available but with the 2 gate inputs of the A-113 four different settings can be adressed).

Additionally the A-113 features a mixture memory with 50 presets. Each preset consists of 4 mixtures that can be selected with the gate inputs, each mixture contains the values of the 4 frequency dividers.

These additional Trautonium modules are available: Trautonium Manual A198 & the Trautonium Filter A104.

Inputs: master frequency (rectangle/pulse input), foot contr. 1 + 2 (gate 1+2) Outputs: 4 single outputs, 1 mixture output.

This module has a maximum current draw of 50mA + 100mA@+5V. It requires 26 TE/HP worth of space to fit in a Euro rack frame